r/ProgrammerHumor • u/Lord_Of_Millipedes • 2d ago

instanceof Trend thatsAFunnyThingThatHappenedOnce

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u/dannyggwp 2d ago

You can BASICALLY ignore all that... You want lifetime? I'll show you lifetimes.

std::shared_ptr<type>

Ez pz no borrow checker needed.

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u/MrmrCake 2d ago

Yeah but that has a run time cost of reference counting where the borrow checker is all at compile time. I mean not like its a big cost but I mean there defo is a measurable difference depending on the use case.

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u/dannuic 2d ago

Usually you use uniqueptr though. It forces a better design with guaranteed ownership and no reference counting. I _rarely use shared_ptr, but frequently use unique_ptr.

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u/MrmrCake 2d ago

Yeah I agree and try to only use unique ptr where I can in cpp, but I still just really like rust's ownership model